var interval;
var week=['일','월','화','수','목','금','토'];

function intervalInit(){
	document.getElementById('btnStart').onclick=startFunc;
	document.getElementById('btnStop').onclick=stopFunc;
}

function startFunc(){
	interval=setInterval(clock, 100);
}

function stopFunc(){
	clearInterval(interval);
}

function clock(){
	var now = new Date();
	cnt = now.getFullYear() + "년 ";
	cnt += (now.getMonth()+1) + "월 "; 
	cnt += (now.getDate()) + "일 ";
	cnt += week[now.getDay()]+ "요일";
	cnt += now.getHours() + ":";
	cnt += now.getMinutes() + ":";
	cnt += now.getSeconds();

	var r =document.getElementById('result')
	r.innerHTML = cnt;
}